<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>后盾人</title>
    <style>
        h1,
        h2 {
            color: yellow;
        }

        h1,
        span {
            background: blue;
        }
    </style>
</head>

<body>
    <h1>houdunren.com</h1>
    <h1>houdunren.com</h1>
    <h1>houdunren.com</h1>
    <h2>后盾人</h2>
    <span>hdcms.com</span>
    <a href="">后盾人</a>
</body>

</html>